H ISTORY A LUMINIUM •Ancient Greeks and Romans used aluminium salts as: – dyeing mordants – astringents for dressing wounds •The metal was first produced in 1825 • Discovered by H. C. Oersted P ROPERTIES •It is a very abundant element in the nature •It is a light metal under point of merger •His color is white and reflects well the electromagnetic radiation •Good electrical and thermal driver

U SES A LUMINIUM The uses that aluminium gives to nowadays are MULTIPLE and we can divide them by sectors: •Electricity and communication •Transport •Building and construction •Packings R ECYCLING •It takes between 200 and 500 years to deteriorate •Any product of aluminium can be recycled infinite times without losing his properties •the material can be re-used

H ISTORY T ITANIUM •Titanium was discovered included in a minera Great Britain by William Gregor •He found black sand by a stream •He noticed the sand was attracted by a magnet D ESCRIPTION •It is a metal of transition •It has a silver greyish color •It forms alloys with other elements to improve the mechanical presentations •It has a small thermal and electrical conductivity

T ITANIUM P ROPERTIES •Titanium is not free in the nature •It has a density of 4507 kg/m3 •Point of merger of 1675 °C •It is paramagnetic •Lighter than steel

T ITANIUM U SES The two most useful properties of the metal are corrosion resistance and the highest strength-to-density. •Metallic alloys •Aeronautical and aerospace industry •In surgery •Heat interchangers in the desalination plants •In metallurgy R ECYCLING •The special steels can be recycled in junk yards or authorized residues managers

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